Search Our Scientific Publications & Authors

Int Ophthalmol 2021 Apr 16. Epub 2021 Apr 16.

University of Health Sciences, Beyoglu Eye Training and Research Hospital, Bereketzade Street Number:2, Beyoglu, Istanbul, Turkey.

Purpose: Evaluating efficacy and safety of iris-supported phakic lenses (Verisyse) for high myopia treatment.

Methods: Patients treated with Verisyse (Abbott Medical Optics, Santa Ana, CA, USA) intraocular lens (IOL) implants were evaluated retrospectively. Patients with follow-up periods of more than 5 years were included in the study. Read More

Int Ophthalmol 2021 Mar 27. Epub 2021 Mar 27.

Cornea and Anterior Segment Division, King Khaled Eye Specialist Hospital, Umm AlHamam AlGharbi, AlUrubah road, Riyadh, Saudi Arabia.

Purpose: To evaluate the outcome and safety of implantable collamer lens (ICL; (Visian, STAAR Surgical, Monrovia, CA, USA) in mild to advance keratoconus patients with myopia and myopic astigmatism.

Methods: This retrospective study evaluated all patients who underwent ICL implantation for the management of keratoconus at a tertiary care eye hospital from January 2012 to January 2018. The mean duration of follow-up was 15. Read More

BMC Ophthalmol 2021 Feb 12;21(1):80. Epub 2021 Feb 12.

The David J. Apple International Laboratory for Ocular Pathology, Department of Ophthalmology, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.

Background: We discuss the safety, since their introduction, of phakic intraocular lenses (pIOLs) to correct refractive errors in healthy eyes. We investigated the reasons for pIOL explantation and the associated perioperative complications.

Methods: This retrospective, cross-sectional study included 69 pIOLs, explanted at a single tertiary center between July 2005 and March 2020: 34 angle-supported (G1), 28 iris-fixated (G2) and seven posterior chamber (G3) pIOLs. Read More

J Ophthalmol 2020 24;2020:5967509. Epub 2020 Dec 24.

Department of Ophthalmology and Eye Research Institute, Eye and ENT Hospital of Fudan University, 83 Fenyang Road, Xuhui District, Shanghai 200031, China.

Purpose: To investigate the long-term changes of corneal endothelial cells (EC) in anterior chamber intraocular lens- (AC-IOL-) implanted eyes.

Methods: Retrospective study. We included 37 eyes (25 patients) that received AC-IOL implantation previously in the Eye and ENT Hospital of Fudan University between 1995 and 2016. Read More

Clin Ophthalmol 2020 30;14:3681-3689. Epub 2020 Oct 30.

George Clinicals, Hyderabad, India.

Purpose: To demonstrate the visual outcomes of a foldable, hydroxy ethyl-methacrylate, single-piece, posterior chamber phakic intraocular lens (pIOL).

Study Type: Retrospective study.

Materials And Methods: Patients presenting with moderate to high myopia who underwent surgical correction with a posterior chamber phakic IOL (refractive intraocular lens, phakic intraocular lens, Appasamy Associates, Chennai, India) were retrospectively reviewed. Read More

J Cataract Refract Surg 2021 Feb;47(2):221-226

From the Department of Ophthalmology, Beyoglu Eye Training and Research Hospital, University of Health Sciences Turkey, Istanbul, Turkey.

Purpose: To compare the long-term safety, efficacy, and complications of small-incision lenticule extraction (SMILE) and flexible iris-fixated anterior chamber phakic intraocular lens (pIOL) implantation for the treatment of high myopia.

Setting: University of Health Science Turkey, Beyoğlu Eye Training and Research Hospital, İstanbul, Turkey.

Design: Retrospective comparative case series. Read More

Clin Ophthalmol 2020 17;14:2011-2019. Epub 2020 Jul 17.

Accuratis. Private Practice for Refractive Surgery, Ulm, Germany.

Purpose: To evaluate the effect of a novel technique to correct presbyopia. A phakic IOL (presbyopic IPCL; implantable phakic contact lens) with a diffractive optic is implanted and its impact on visual acuity, refraction, patient satisfaction in patients striving for spectacle-independence is evaluated.

Design: Retrospective noncomparative open-label clinical trial. Read More

Indian J Ophthalmol 2020 07;68(7):1418-1423

Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.

Purpose: To quantitatively assess anterior chamber and angle parameters by anterior segment optical coherence tomography (AS-OCT) in myopic eyes undergoing Implantable Collamer Lens (ICL V4c) implantation.

Methods: Prospective noncomparative observational case series. Pre and postoperative (1 and 3 month) AS-OCT angle parameters (anterior chamber depth [ACD], anterior chamber angle [ACA], Angle opening distance [AOD], trabecular iris space area [TISA], scleral spur angle [SSA]) were evaluated in 32 eyes (16 patients). Read More

Int Ophthalmol 2020 Aug 10;40(8):2017-2022. Epub 2020 May 10.

Beyoğlu Eye Research and Training Hospital, Bereketzade Mah, No: 2, Beyoglu, Istanbul, Turkey.

Purpose: To evaluate the effect of Eyecryl posterior chamber phakic intraocular lens (pIOL) on axial length measurement and intraocular lens power calculation.

Methods: Axial length (AL), keratometry (K), and IOL power calculations were compared at monthly preoperative and postoperative visits (preoperative vs 1-month). Preoperative IOL power (calculated using preoperative K and AL) was compared with a re-calculation where the pIOL was assumed to be in the posterior chamber (calculated using preoperative K value and postoperative AL). Read More

J Cataract Refract Surg 2019 08;45(8):1092-1098

University Eye Clinic Maastricht, Maastricht University Medical Center, Heerlen, the Netherlands; Department of Ophthalmology, Zuyderland Medical Center, Heerlen, the Netherlands.

Purpose: To determine risk factors for explantation of iris-fixated phakic intraocular lenses (pIOLs) with a maximum 17-year follow-up.

Setting: University Eye Clinic Maastricht, Maastricht UMC+, the Netherlands.

Design: Prospective case series. Read More

Graefes Arch Clin Exp Ophthalmol 2019 Jun 9;257(6):1331-1339. Epub 2019 Apr 9.

Department of Refractive Surgery, Clínica Baviera Castellón, Castellón, Spain.

Purpose: To assess the visual outcomes and ocular safety when implanting diffractive trifocal intraocular lenses in a population of high myopic eyes.

Methods: This is a retrospective cumulative clinical study. Two hundred five myopic eyes consecutively operated in the hospitals of Clínica Baviera, Spain, were included. Read More

J Refract Surg 2019 Mar;35(3):177-183

Purpose: To assess the effect of crystalline lens rise (CLR) on postoperative vault in eyes implanted with a phakic Visian Implantable Collamer Lens (ICL) (STAAR Surgical Company, Monrovia, CA) with a central port for myopic correction.

Methods: Non-invasive Fourier-domain swept-source anterior segment optical coherence tomography was used for dynamic assessment of the study eyes under changing light conditions. Phakic intraocular lens (IOL) vault, anterior chamber depth (ACD), and CLR were recorded after surgery, and intra-eye differences were analyzed under scotopic and photopic ambient light conditions. Read More

BMJ Case Rep 2018 Dec 3;11(1). Epub 2018 Dec 3.

Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, Delhi, India.

Implantable collamer lenses (ICL) have gained popularity for correction of myopia where kerato-refractive procedures are not indicated as in cases of high myopic refractive errors. Toxic anterior segment syndrome (TASS) is a very uncommonly reported postoperative complication following ICL implantation. A young patient developed severe corneal oedema and anterior segment inflammation on the first day after ICL implantation. Read More

J Refract Surg 2018 Dec;34(12):817-823

Purpose: To evaluate the outcomes of a new posterior chamber phakic intraocular lens (IPCL; Care Group, Baroda, India) to correct myopia.

Methods: This prospective, observational case series included 30 eyes undergoing implantation of the IPCL for high myopia (> -8.00 diopters [D]). Read More

Case Rep Ophthalmol 2018 Sep-Dec;9(3):465-472. Epub 2018 Nov 21.

University of Washington Department of Ophthalmology, Seattle, Washington, USA.

Purpose: We report a case of a highly myopic pseudophakic patient who received off-label placement of a phakic intraocular lens (pIOL) via a "piggyback" technique, allowing the placement of an intraocular lens (IOL) in his fellow eye, resulting in improved visual acuity and emmetropia.

Case Report: A 66-year-old, highly myopic, pseudophakic male with an IOL implant in his left eye was referred for second opinion for surgical options for his phakic right eye. Given the severe myopic status of both eyes, he received off-label placement of a posterior chamber pIOL with a piggyback technique for the pseudophakic left eye followed by standard cataract surgery and intraocular lens implantation in the right eye. Read More

Can J Ophthalmol 2018 10 28;53(5):518-522. Epub 2018 Mar 28.

Gimbel Eye Centre, Calgary, Alta. Electronic address:

Objective: Although the literature on the implantable Collamer lens (ICL) suggests an increasing rate of anterior subcapsular cataract (ASC) development with increasing age and decreasing anterior chamber depth (ACD), the exact correlation is not known. We performed a retrospective observation study of 1653 eyes and calculated the incidence of ICL removal with cataract extraction and intraocular lens placement (CE-IOL) as a result of ASC, in correlation to patient's age and ACD.

Design: Retrospective observation study. Read More

J Cataract Refract Surg 2018 Nov 28;44(11):1321-1325. Epub 2018 Sep 28.

From Lebanese University (Amro, Chanbour, Jarade), Faculty of Medical Sciences, Beirut Eye and ENT Specialist Hospital (Amro, Chanbour, Arej, Jarade), and Saint Joseph University (Arej), Faculty of Medical Sciences, Beirut, Lebanon; Medclinic Dubai Mall (Jarade), Dubai, United Arab Emirates. Electronic address:

Purpose: To determine the effect of Visian Implantable Collamer Lens phakic intraocular lens (pIOL) insertion on biometric parameters and IOL power calculation.

Setting: Beirut Eye and ENT Specialist Hospital, Beirut, Lebanon.

Design: Prospective case series. Read More

J Ophthalmol 2018 19;2018:1329874. Epub 2018 Jun 19.

Beyoğlu Eye Research and Training Hospital, Bereketzade Mah., No. 2 Beyoglu, Istanbul, Turkey.

Purpose: To report clinical results of a foldable, hydrophilic acrylic, single-piece, injectable, posterior chamber phakic intraocular lens (pIOL).

Material And Methods: Medical records of patients who underwent posterior chamber phakic IOL (Eyecryl Phakic IOL, Biotech Vision Care, Ahmedabad, India) implantation for surgical correction of myopia were retrospectively reviewed. Only patients with at least a one-year follow-up were included. Read More

J Refract Surg 2018 May;34(5):338-342

Purpose: To report the efficacy, predictability, and safety of femtosecond laser-assisted cataract surgery (FLACS) in eyes with anterior chamber phakic intraocular lenses (IOLs).

Methods: This retrospective case series included eyes with previous implantation of an angle-supported and an iris-fixated phakic IOL for the correction of myopia that underwent a combined procedure of phakic IOL ex-plantation and FLACS with in-the-bag implantation of a posterior chamber IOL. Postoperative corrected distance visual acuity (CDVA), predictability of refractive outcome, and occurrence of intraoperative and postoperative complications were analyzed. Read More

Int Ophthalmol 2019 Mar 21;39(3):661-666. Epub 2018 Feb 21.

Department of Ophthalmology, Isfahan Eye Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.

Purpose: The aim of this study was to determine the correlation between ocular biometric parameters and sulcus-to-sulcus (STS) diameter.

Methods: This was a cross-sectional study of preoperative ocular biometry data of patients who were candidates for phakic intraocular lens (IOL) surgery. Subjects underwent ocular biometry analysis, including refraction error evaluation using an autorefractor and Orbscan topography for white-to-white (WTW) corneal diameter and measurement. Read More

Cesk Slov Oftalmol Fall 2017;73(3):87-93

Aim: To evaluate late postoperative complications, especially cataract occurrence, its morphological type and factors affecting its development in patients implanted with ICL (Implantable Collamer Lens).

Methods: We analysed the results of ICL implantation in 34 patients (type ICM V4 for myopia, ICH V3 for hyperopia, TICM V4 for astigmatism) in our department between 1998 and 2013. The cohort comprised 62 eyes (40 myopic and 22 hyperopic). Read More

Vision Res 2017 11 11;140:96-105. Epub 2017 Sep 11.

Simpson Optics LLC, 3004 Waterway Court, Arlington, TX 76012, United States. Electronic address:

The region of far peripheral vision, beyond 60 degrees of visual angle, is important to the evaluation of peripheral dark shadows (negative dysphotopsia) seen by some intraocular lens (IOL) patients. Theoretical calculations show that the limited diameter of an IOL affects ray paths at large angles, leading to a dimming of the main image for small pupils, and to peripheral illumination by light bypassing the IOL for larger pupils. These effects are rarely bothersome, and cataract surgery is highly successful, but there is a need to improve the characterization of far peripheral vision, for both pseudophakic and phakic eyes. Read More

J Refract Surg 2017 Sep;33(9):598-602

Purpose: To retrospectively evaluate the current practice, trends, and outcomes of refractive surgery in Japan.

Methods: This multicenter survey comprised 78,248 eyes of 39,727 consecutive patients who underwent refractive surgery at 45 major institutions in Japan. The corresponding ophthalmologists responded to a selfadministered questionnaire. Read More

J Cataract Refract Surg 2017 07;43(7):969-974

From the Department of Ophthalmology (Steinwender, Varna-Tigka, Shajari, Kohnen), Goethe-University, Frankfurt, Germany; Department of Ophthalmology (Steinwender), Medical University of Graz, Graz, Austria. Electronic address:

Purpose: To report the rare entity of anterior subcapsular cataract after implantation of a posterior chamber phakic intraocular lens (pIOL) with a central hole.

Setting: Department of Ophthalmology, Goethe-University, Frankfurt, Germany.

Design: Retrospective case series. Read More

Br J Ophthalmol 2018 02 13;102(2):177-181. Epub 2017 Jun 13.

Ray Eye Clinic, Hyogo, Japan.

Aim: To compare the clinical outcomes of posterior chamber phakic intraocular lens implantation with a central hole (Hole Implantable Collamer Lens (ICL), STAAR Surgical) for low-to-moderate myopia and for high myopia.

Methods: This multicentre retrospective case series comprised 351 eyes of 351 consecutive patients undergoing ICL implantation. Eyes were divided into groups based on preoperative degree of myopia: group 1; 57 eyes, manifest spherical equivalent less than -6 dioptres (D), and group 2; 294 eyes, -6 D or more. Read More

J Refract Surg 2017 Jun;33(6):426-428

Purpose: To report a case of severe recurrent cellular deposits after Artiflex intraocular lens (Ophtec B. V., Groningen, The Netherlands) implantation. Read More

Klin Monbl Augenheilkd 2017 Aug 9;234(8):1035-1047. Epub 2017 May 9.

Implanting phakic IOLs (PIOLs) in phakic eyes is regarded as an established option in refractive surgery for many years when treating high myopia, hyperopia or ametropia. Even for eyes which show a combination of refractive errors (including astigmatism) this can be an appropriate option. The surgery itself requires certain anatomical and refractive requirements, since, as with any intraocular procedure, there are different possibilities of complication depending on the chosen IOL. Read More

BMJ Case Rep 2017 Apr 20;2017. Epub 2017 Apr 20.

Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.

We describe the case of a 30-year-old man with pathological myopia with a phakic intraocular lens (IOL) (Visian ICL V4c model; STAAR, Monrovia, California, USA) in situ having complaints of metamorphopsia in the left eye with documented myopic foveoschisis on swept-source optical coherence tomography (DRI OCT Triton; Topcon, Tokyo, Japan). The patient underwent pars plana vitrectomy with internal limiting membrane peeling. This report discusses the intraoperative challenges occurring as a result of increased optical aberrations in the presence of a phakic IOL. Read More

J Refract Surg 2017 Apr;33(4):274-277

Purpose: To describe the use of intraoperative optical coherence tomography (OCT) vault measurement in 5 cases of posterior chamber phakic intraocular lens (IOL) implantation.

Methods: This case series included 5 eyes in 3 consecutive patients undergoing phakic IOL implantation. RTVue OCT (Optovue, Inc. Read More